Method download_packages

dev-scripts/src/sync/mirror/mod.rs:284–360

Downloads all packages and signatures of a package repository to a local directory.

(
        &self,
        repo_name: &str,
        file_source: String,
        download_dest: &PathBuf,
    )

    /// Downloads all packages and signatures of a package repository to a local directory.
    fn download_packages(
        &self,
        repo_name: &str,
        file_source: String,
        download_dest: &PathBuf,
    ) -> Result<Vec<PathBuf>, Error> {
        let mut cmd = Command::new("rsync");
        cmd.args([
            "--recursive",
            "--perms",
            "--times",
            "--delete",
            "--hard-links",
            // Copy actual files instead of symlinks.
            // Most symlinks point to files up the tree of where we're looking at,
            // which is why normal symlinks would be invalid.
            "--copy-links",
            // Check for deletions once everything has been transferred
            "--delete-after",
            // Only overwrite updated files in the very end.
            // This allows for a somewhat "atomic" update process.
            "--delay-updates",
            // Print structured change information to be parsed
            "--itemize-changes",
        ]);

        // Don't download any files related to repository sync databases.
        for variation in [
            ".db",
            ".db.sig",
            ".db.tar.*",
            ".db.tar.*.sig",
            ".db.tar.*.old",
            ".db.tar.*.old.sig",
            ".links.tar.*",
            ".links.tar.*.sig",
            ".files",
            ".files.sig",
            ".files.tar.*",
            ".files.tar.*.sig",
            ".files.tar.*.old",
            ".files.tar.*.old.sig",
        ] {
            cmd.arg(format!("--exclude={repo_name}{variation}"));
        }

        trace!("Running command: {cmd:?}");
        let output = cmd
            .arg(file_source)
            .arg(download_dest)
            .output()
            .map_err(|source| Error::Io {
                context: format!(
                    "syncing all package and signature files for repository {repo_name}"
                ),
                source,
            })?;